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Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2014
Accrued Liabilities [Abstract] |
Components of accrued liabilities | The components of accrued liabilities are summarized below (in thousands):
| As of December 31,
| 2014 | 2013
Accrued compensation and related charges | $ | 2,656 |  | $ | 1,762 |
Accrued product warranty |  | 802 |  |  | 1,048 |
Current portion of royalty payments |  | 800 |  |  | 800 |
Accrued professional services |  | 509 |  |  | 543 |
Dividends payable by consolidated joint ventures |  | 563 |  |  | 649 |
Accrued income taxes |  | 119 |  |  | 125 |
Other accrued liabilities |  | 2,185 |  |  | 2,359 |
| $ | 7,634 |  | $ | 7,286 |

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